[motordude]

Hello Bill,
the program is quite large, but the problem is not consistent. I ran the program from the card, and there was a problem. I turned off the machine and ran the same program again 2 minutes later, from the card and everything else the same, and the problem was gone. This error has come up twice in 340 hours, so I doubt running the program from the machine memory will tell me if the problem lies with the card.

Best regards
John

[angelw]

Hello Bill,
the program is quite large, but the problem is not consistent. I ran the program from the card, and there was a problem. I turned off the machine and ran the same program again 2 minutes later, from the card and everything else the same, and the problem was gone. This error has come up twice in 340 hours, so I doubt running the program from the machine memory will tell me if the problem lies with the card.

Best regards
John

Hi John,
Intermittent problems can be hard to pin down. However, unless you change something in an attempt to rule out possible causes, you may never find the cause of the problem.

If you ran the program from memory and after a good amount of time, perhaps your previously mentioned 340 hours, you had no problems, then change back to running from the card for an extended amount of time to see if the problem occurred again. If the problem appears running from memory, then you could probably dismiss the card as the cause of the problem and focus elsewhere.

No matter what is causing the problem, and what steps you take to remedy the issue, its going to take you some time to know if the problem has been resolved.

Regards,

Bill

[motordude]

Hello Bill,
thanks for your reply. If I was to run my programs from the machinememory, I would have to divide the into unreasonably many smaller programs, and that would just be to cumbersome. All of my programs are moulds and 3D machining and seldom takes less than 15 hours. To cut the program into smaller bits for the machine memory to handle, would just take too much time, both machinehours and manhours.

Anyway, my machine rep and Fanuc have acknowledged the problem, and Fanuc is sending a guy over to look at it, as it is still under warranty.

best regards
John

[ALEXCOMO]

Hi,
a little answer...do you use absolute or incremental in cam post?
arc format xyr or xyji?

Incremental can cause lost precision and xyr arc format could fall.

Tell us whath Fanuc guy say!!!!

But if you make 3d why you don't use g05 ?

[motordude]

Hello Alex,
to your question about absolute/incremental and arc format, I must say I don't know.....G05 is not available in my machine configuration, but I do have G08, but haven't tried it. I'll make a test with and without G08 when I get the time, and compare the results.

I'll post the results from the Fanuc guy!

John

[motordude]

Hello all,
the Fanudc guy came here in a few days ago. He couldn't find any errors, but there was a small proplem with one of my programs. I used G17 when it should have been G19. But the second time the problem occured, the G17/G19 scenario wasn't an issue, so it must have been something else. He tried to provoke the machine using G17/G19 commands wrongly, but nothing happened.

Anyway, to be on the safe side, he changed a servo driver card, hopefully that will cure the problem. We'll wait and see!

[dparish]

Hello all,
the Fanudc guy came here in a few days ago. He couldn't find any errors, but there was a small proplem with one of my programs. I used G17 when it should have been G19. But the second time the problem occured, the G17/G19 scenario wasn't an issue, so it must have been something else. He tried to provoke the machine using G17/G19 commands wrongly, but nothing happened.

Anyway, to be on the safe side, he changed a servo driver card, hopefully that will cure the problem. We'll wait and see!

FYI, For those who view this post later, as I did, I also have a FANUC Oi-MC controller on a Robodrill Mate that has a similar problem. I have been using a 16G CF memory card (Sandisk Ultra) because I saw that it worked. However I knew the Oi-MC operators manual only "tested and certified" smaller and older Sandisk and Hitachi CF cards, with a maximum size of 512M.

My theory is that the CF card may be doing some FLASH memory housekeeping occasionally, to do "levelling" of the flash, and causing a momentary pause during streaming. I had some old Sandisk 256M and 512M CF cards and will test them. I really dont need 16G, but do need to get rid of the occasional pause in motion after the machine has run a long time (over 10 hours continuous, as I am mold making).